Underground sulphur is extracted (recovered) by the

Options

A. Clause process
B. Frasch process
C. Dow's process
D. Kolbe process

Answer

2

Explanation

Elemental `S` is found is larged underground deposits in both the united states and poland ,It is delivered they were formed by the action of ananeroble bacteria on lake -bottom depostie of sulphate minerals. A discovery causing great excitement among planetay scientist is the evidence for large deposits of sulphur onJupiter's moon, Io.
The method of extraction ,th frasch process, was devised by Canadian scientist .Herman Frasch.The `S` deposits are between `150` an d `750`m underground and are typically about `30m` thick .A pipe `20cm`,in diameter ,is sunk almost to the bottom of the deposits. Then a `10-cm` pipe is inserted inside the larger one,this pipe is a little shorter than the outer pipe. Finally a`2.5-`cm pipe is inserted intothe middle pipe but ends about halfway down the length of the outer pipes
Water at `165^(@)C` is initially pumped down both outer pipes, this water melts the surrounding sulphur. The flow of superheated water down the `10-cm` pipe is discontinued and liquid pressure starts to force the dense liquid sulphur up that pipe. Compressed air is pumped down the `2.5cm` pipe,producing a low-density forth that flows freely up the `10-cm` pipe to the surface. At the surface the sulphur-water-air mixture is pumped into gigantic tanks, when it cools and the violet sulfure liquid crystallizes to a solid yellow block . The retaining walls of the tank are then removed ,and a dynamite is used to breal up the block to a size that cn be transported by rail car.
The production of elemental sulphur from the hydrogen sulphide in natural gas is accomplished by using Claus process.